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Coal

Coal is a combustible black or brownish-black sedimentary rock usually occurring in rock strata in layers or veins called coal beds or coal seams. The harder forms, such as anthracite coal, can be regarded as metamorphic rock because of later exposure to elevated temperature and pressure. Coal is composed primarily of carbon along with variable quantities of other elements, chiefly hydrogen, sulfur, oxygen, and nitrogen.

Contributors in Coal

Coal

Sodium tripolyphosphate

Energy; Coal

A white powder used for water softening and as a food additive and texturizer.

Unglazed solar collector

Energy; Coal

A solar thermal collector that has an absorber that does not have a glazed covering. Solar swimming pool heater systems usually use unglazed collectors because they circulate relatively large volumes ...

Other demand-side management (DSM) assistance programmes

Energy; Coal

A DSM programme assistance that includes alternative-rate,fuel-switching, and any other DSM assistance programmes that are offered to consumers to encourage their participation in DSM programs.

Rate of return

Energy; Coal

The ratio of net operating income earned by a utility is calculated as a percentage of its rate base.

Space heating

Energy; Coal

The use of energy to generate heat for warmth in housing units using space-heating equipment. The equipment could be the main space-heating equipment or secondary space-heating equipment. It does not ...

Uniform system of accounts

Energy; Coal

Prescribed financial rules and regulations established by the Federal Energy Regulatory Commission for utilities subject to its jurisdiction under the authority granted by the Federal Power Act.

Other end users

Energy; Coal

For motor gasoline, all direct sales to end users other than those made through company outlets. For No. 2 distillate, all direct sales to end users other than residential, commercial/institutional, ...

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